Msg3 transmission method, device, equipment and storage medium

Abstract

The embodiment of the present application provides a method, device, equipment and storage medium for transmitting Msg3, the method comprising: a terminal device receives Msg3 repetition transmission indication information sent by a network device, determines the configuration parameters for repetition transmission of Msg3; and repetition transmission of Msg3 according to the Msg3 repetition transmission indication information. The method, device, equipment and storage medium for transmitting Msg3 provided in the embodiment of the present application perform repetition transmission of Msg3 according to the channel conditions, improve the reliability of Msg3 transmission and reduce the number of retransmissions, and ensure the efficiency of random access process execution.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a Msg3 transmission method, device, equipment and storage medium. Background Art

[0002] In the random access procedure defined in New Radio (NR) version 15 / 16 (Rel 15 / 16), only one copy of message 3 (Msg3) is transmitted per scheduling. If the transmission of msg3 fails, the terminal device needs to re-execute the random access procedure.

[0003] An evaluation of each physical channel in NR Rel17 found that the robustness of Msg3 in the contention access process is lower than that of other physical channels. This results in the terminal device at the edge of the cell being likely to fail in random access due to the failure of Msg3 transmission during the random access process, resulting in an increase in random access time. Summary of the invention

[0004] The embodiments of the present application provide a Msg3 transmission method, apparatus, device and storage medium, which can solve the problem of long random access time.

[0005] In a first aspect, an embodiment of the present application provides a Msg3 transmission method, including:

[0006] The terminal device receives the Msg3 retransmission indication information sent by the network device, and determines the configuration parameters for the Msg3 retransmission;

[0007] Repeat sending Msg3 according to the Msg3 repetition indication information.

[0008] In a second aspect, an embodiment of the present application provides a Msg3 transmission method, including:

[0009] The network device sends Msg3 repeated sending indication information to the terminal device, where the Msg3 repeated sending indication information is used to determine a configuration parameter for Msg3 repeated sending for the terminal device;

[0010] Receive Msg3 repeatedly sent by the terminal device according to Msg3 retransmission indication information.

[0011] In a third aspect, an embodiment of the present application provides a Msg3 transmission device, including:

[0012] The first receiving module is used to receive Msg3 repeated sending indication information sent by the network device, and determine the configuration parameters for the repeated sending of Msg3;

[0013] The first sending module is used to repeatedly send Msg3 according to Msg3 repeated sending indication information.

[0014] In a fourth aspect, an embodiment of the present application provides a Msg3 transmission device, including:

[0015] A third sending module, used to send Msg3 repeated sending indication information to the terminal device, wherein the Msg3 repeated sending indication information is used to determine the configuration parameters of Msg3 repeated sending for the terminal device;

[0016] The third receiving module is used to receive Msg3 repeatedly sent by the terminal device according to Msg3 repeated sending indication information.

[0017] In a fifth aspect, an embodiment of the present application provides a terminal device, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect.

[0018] In a sixth aspect, an embodiment of the present application provides a network device, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the second aspect.

[0019] In a seventh aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect or the second aspect are implemented.

[0020] In an eighth aspect, an embodiment of the present application provides a chip, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect or the second aspect.

[0021] The Msg3 transmission method, apparatus, device and storage medium provided in the embodiments of the present application perform repeated transmission of Msg3 according to the channel conditions, improve the reliability of Msg3 transmission and reduce the number of retransmissions, and ensure the efficiency of random access process execution. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural diagram of a wireless communication system applicable to the embodiments of the present application;

[0023] Figure 2 One of the schematic diagrams of the Msg3 transmission method provided in the embodiment of the present application;

[0024] Figure 3 The second schematic diagram of the Msg3 transmission method provided in the embodiment of the present application;

[0025] Figure 4One of the schematic diagrams of the Msg3 transmission device provided in the embodiment of the present application;

[0026] Figure 5 The second schematic diagram of the Msg3 transmission device provided in the embodiment of the present application;

[0027] Figure 6 A schematic diagram of the hardware structure of a terminal provided in an embodiment of the present application;

[0028] Figure 7 A schematic diagram of the hardware structure of the network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here. In addition, the "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0031] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE Evolution (LTE-Advanced, LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned systems and radio technologies as well as for other systems and radio technologies. However, the following description describes a new radio (NR) system for example purposes, and NR terms are used in most of the following descriptions, and these technologies can also be applied to applications other than NR system applications, such as the 6th Generation (6G) communication system.

[0032] Figure 1The structure diagram of a wireless communication system applicable to the embodiment of the present application is shown in FIG. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 may also be referred to as a terminal device or a user terminal (User Equipment, UE). The terminal 11 may be a mobile phone, a tablet computer (Tablet Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), a wearable device (Wearable Device) or a vehicle-mounted device (VUE), a pedestrian terminal (PUE) and other terminal side devices. The wearable device includes: a bracelet, a headset, glasses, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 can be a base station or a core network, wherein the base station can be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a B node, an evolved B node (eNB), a home B node, a home evolved B node, a WLAN access point, a WiFi node, a transmitting and receiving point (Transmitting Receiving Point, TRP) or some other suitable term in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is taken as an example, but the specific type of the base station is not limited.

[0033] Figure 2 This is one of the schematic diagrams of the Msg3 transmission method provided in the embodiment of the present application, such as Figure 2 As shown, the embodiment of the present application provides a Msg3 transmission method, and the execution subject may be a terminal device, such as a mobile phone. The method includes:

[0034] Step 201: The terminal receives Msg3 retransmission indication information sent by the network device, and determines the configuration parameters for retransmission of Msg3;

[0035] Step 202: Repeat sending Msg3 according to the Msg3 repeat sending indication information.

[0036] The Msg3 repetition sending indication information includes at least one of the following:

[0037] System information block SIB;

[0038] Random access response RAR information;

[0039] Downlink control information DCI scrambled by random access radio network temporary identifier RA-RNTI;

[0040] The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI.

[0041] Specifically, the trigger information for repeated sending of Msg3 is determined according to the random access corresponding RAR information or the downlink control information DCI scrambled by RA-RNTI or the DCI scrambled by TC-RNTI; the configuration parameters for repeated sending of Msg3 are determined according to the configuration information and / or protocol predefined parameters in the system message block SIB combined with the dynamic indication information of the random access corresponding RAR information or the downlink control information DCI scrambled by RA-RNTI or the DCI scrambled by TC-RNTI.

[0042] Optionally, before repeatedly sending Msg3 according to the Msg3 re-sending indication information, the method further includes:

[0043] Receive synchronization signal blocks SSB and system information sent by network equipment;

[0044] Based on the SSB and the system information, determine whether to request the network device to repeat the sending operation of Msg3.

[0045] Optionally, the system information includes at least one of the following configuration information:

[0046] The first threshold value T0 of signal strength / signal quality / path loss;

[0047] The third threshold value M0 of the Msg3 transport block size;

[0048] Allow list / block list for Msg3 transport;

[0049] The second threshold value T1.

[0050] Optionally, the above configuration information may also be configured to the network device and the terminal device in a manner predefined by the protocol.

[0051] The allowed list / blocked list of the Msg3 transmission is an event that allows or prohibits the execution of repeated transmission of Msg3, and the event is a triggering event of the random access process defined in the protocol.

[0052] Optionally, a threshold value set T0 containing multiple threshold values ​​is configured respectively according to the third threshold value M0. For example, the first threshold value of the threshold value set is configured for Msg3 whose transmission block is smaller than the third threshold value M0, and the second threshold value of the threshold value set is configured for Msg3 whose transmission block is greater than the third threshold value M0.

[0053] Optionally, a threshold value set T0 including multiple threshold values ​​is configured according to events in the allowed list transmitted by Msg3 or events outside the blocked list transmitted by Msg3, and the threshold values ​​in the threshold value set correspond to the above events.

[0054] Optionally, the second threshold value T1 may be a threshold value for selecting SSB defined in a 4-step random access process in the protocol, or the second threshold value T1 may be a threshold value notified through a system message.

[0055] Optionally, before repeatedly sending Msg3 according to the Msg3 repeated sending indication information, the method includes:

[0056] When the first condition is met, the terminal device selects the parameters corresponding to the SSB whose signal quality is greater than the first threshold value T0 as the configuration parameters of the first Msg1. If there are multiple SSBs that meet the above requirements, the terminal device selects one of the SSBs according to the actual algorithm; the configuration parameters are the subsequent set of the preamble code preamble of Msg1 obtained by combining the selected SSB number with the Msg3 to repeatedly send the corresponding Msg1 related parameters, and the time-frequency resource configuration parameters of the random access channel RACH opportunity. If the signal quality of any SSB signal received by the terminal device is less than the first threshold value T0, the terminal device selects any SSB through the actual algorithm. The signal quality can be RSRP, RSRQ, SINR.

[0057] Optionally, when the terminal device measures the SSB signal quality, it uses the layer one filtering rules predefined in the protocol and selects an SSB greater than the first threshold value T0 according to the SSB signal quality output by the layer one filtering.

[0058] Optionally, the first threshold value T0 can also be determined by differential means, that is, the first threshold value T0 is the addition result of the threshold value defined in the protocol and the differential value, wherein the threshold value defined in the protocol can be the threshold value for selecting SSB defined in the 4-step random access process in the protocol, and the differential value can be notified by system message or predefined by the protocol.

[0059] Optionally, the first condition includes at least one of the following:

[0060] The terminal device detects that the signal quality of all SSBs is lower than the second threshold value T1, where the second threshold value may be a threshold value for selecting SSB defined in a 4-step random access process in the protocol, or a threshold value notified through a system message;

[0061] The terminal device has made N random access channel RACH attempts and all failed;

[0062] The number of RACH attempts performed by the terminal device reaches a first upper limit value;

[0063] The terminal device sends Msg1 multiple times to increase the transmission power and the transmission power reaches a second upper limit value, where the second upper limit value is a value defined by the protocol;

[0064] The data size of Msg3 exceeds the third threshold value M0;

[0065] Msg3 transmission fails and Msg3 is retransmitted M times but still fails;

[0066] Msg3 transmission fails and the number of Msg3 retransmissions reaches the third upper limit.

[0067] Optionally, the second threshold value T1 can also be determined by differential means, that is, the second threshold value T1 is the addition result of the threshold value defined in the protocol and the differential value, wherein the threshold value defined in the protocol can be the threshold value for selecting SSB defined in the 4-step random access process in the protocol, and the differential value can be notified by system message or predefined by the protocol.

[0068] Optionally, the system information includes at least one of the following:

[0069] The number of times Msg3 is sent repeatedly;

[0070] The time domain resource allocation TDRA table used when Msg3 is repeatedly sent;

[0071] Msg3 time slot configuration parameters;

[0072] Msg3 repeatedly sends the corresponding Msg1 related parameters;

[0073] Msg3 repeatedly sends the corresponding Msg2 related parameters.

[0074] Optionally, the RAR information includes at least one of the following:

[0075] The number of times Msg3 is sent repeatedly;

[0076] Msg3 repeatedly sends the inter-slot frequency hopping enable field;

[0077] Msg3 Redundancy Version RV.

[0078] Optionally, the frequency hopping enable field in the RAR may be redefined as an inter-time slot frequency hopping enable field, that is, the RAR includes the inter-time slot frequency hopping enable field.

[0079] Optionally, the downlink control information DCI scrambled by the random access radio network temporary identifier RA-RNTI includes:

[0080] The parsing method indication of the RAR information; the parsing method indication is used to instruct the terminal device to parse according to the RAR format in the protocol or to repeatedly send the corresponding RAR format for parsing according to Msg3.

[0081] Optionally, the DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI includes at least one of the following:

[0082] Msg3 repeated trigger message;

[0083] The number of times Msg3 is sent repeatedly;

[0084] Frequency hopping mode for repeated transmission of Msg3;

[0085] Msg3 Redundancy Version RV.

[0086] Optionally, the TDRA table includes time domain configuration information and a corresponding number of Msg3 repetitions. The TDRA table is predefined by a protocol or configured to a terminal device through system information.

[0087] Optionally, the Msg1 related parameters corresponding to the repeated sending of Msg3 include at least one of the following:

[0088] A candidate physical random access channel PRACH preamble code set;

[0089] The time-frequency resources and period for sending Msg1.

[0090] The configuration of at least one of the above parameters is different from the configuration of the parameters defined in the existing protocol.

[0091] Optionally, the Msg2 related parameters corresponding to the repeated sending of Msg3 include at least one of the following:

[0092] RAR time window;

[0093] MAC subPDU mapping rules and restrictions.

[0094] Optionally, before the terminal device receives the Msg3 repeated sending indication information sent by the network device, the method includes:

[0095] Sending Msg1 to the network device, wherein parameters of the Msg1 are determined by the system message and / or the SSB measurement result.

[0096] The network device receives Msg1 and measures the PRACH signal quality. The network device determines the terminal's request to repeatedly send Msg3 based on the sending parameters of Msg1, or the network device determines whether the terminal needs to repeatedly send Msg3 based on the PRACH signal quality. The network device determines the number of repetitions of Msg3 based on the PRACH signal quality.

[0097] Specifically, in the initial access phase, the network device (base station) or terminal in the wireless network determines the trigger condition for repeated transmission of Msg3 according to the reference signal receiving power (RSRP) / reference signal receiving quality (RSRQ) / path loss (pathloss) of the uplink signal or the downlink signal and / or the size of the Msg3 transmission block. The base station instructs the terminal to repeatedly send Msg3 through the system information block (SIB), random access response (RAR), random access radio network temporary identity (RA-RNTI) scrambled DCI1-0 or temporary cell radio network temporary identity (TC-RNTI) scrambled DCI 0-0, and configures the relevant parameters for repeated transmission of Msg3.

[0098] First case:

[0099] The terminal determines whether to trigger repeated transmission of Msg3 based on the current downlink signal synchronization signal block (SSB) or RSRP / RSRQ / pathloss of CSI-RS and / or the size of Msg 3. The terminal uses Msg1 to apply to the base station for repeated transmission of Msg3. The base station sends RAR to configure Msg3 transmission parameters for the terminal, and the terminal parses RAR according to the situation of repeated transmission of Msg3. The specific steps are as follows:

[0100] 1. The base station periodically sends SSB and system information, which includes at least one of the following information:

[0101] (1) The first threshold value T0 of signal strength / signal quality / path loss.

[0102] The first threshold value T0 is used to select an SSB that meets the signal quality requirement for repeated transmission of Msg3.

[0103] The configuration method of the first threshold value T0 can be to indicate it explicitly in the RRC signaling, or to indicate the difference between T0 and a specific threshold value (for example, rsrp-ThresholdSSB) in the RACH process, or to be implicitly converted through the number of Msg3 repetitions (for example, different numbers of Msg3 repetitions correspond to different differences).

[0104] The first threshold value T0 may also be predefined by the protocol and maintain a fixed difference with a specific threshold value (eg, rsrp-ThresholdSSB) in the RACH process.

[0105] (2) The number of times Msg3 is sent repeatedly.

[0106] Indicates the configurable number of repetitions when Msg3 is sent repeatedly. The number of repetitions can be an integer or a set of multiple different integers. Optionally, the terminal configures multiple different numbers of repetitions / number of repetitions sets according to the size of the msg3 transmission block.

[0107] (3) The time domain resource allocation (TDRA) table used when Msg3 is sent repeatedly.

[0108] The network configures a new set of TDRA tables for the terminal, which contains time domain configuration information and the corresponding number of Msg3 repetitions.

[0109] Optionally, the terminal configures a plurality of different TDRA tables according to the size of the msg3 transmission block, carrying different numbers of repetitions.

[0110] (4) Msg3 time slot configuration parameters.

[0111] For example, whether time slot hopping is supported, and the redundancy version (RV) of Msg3 PUSCH.

[0112] (5) The Msg3 transport block size threshold M0 predefined by the protocol or notified by the system message or the allow list / block list (white list / black list) of the triggering event.

[0113] If the Msg3 transmission block is larger / smaller than the threshold M0 or is not within the whitelist allowed event or within the blacklist time, application for repeated Msg3 transmission is not allowed.

[0114] (6) Msg3 repeats sending the corresponding Msg1 related parameters.

[0115] Msg1 related parameters include candidate PRACH preamble set, time-frequency resources and period (RACH occasion) for sending Msg1.

[0116] At least one of the above parameters is different from the traditional Msg1 configuration parameters. That is, if the terminal needs to perform a random access procedure of repeatedly sending Msg3, it needs to send Msg1 according to the new Msg1 parameters (preamble set, RO parameters).

[0117] Optionally, the msg1 resources (preamble, RO) configured in the random access process of the Msg3 repetition can be further divided into multiple small sets according to the size of the Msg3 transmission block.

[0118] (7) Msg3 repeatedly sends the corresponding Msg2 related parameters.

[0119] For example, RAR time windows, media access control sub-protocol data unit (MAC subPDU) mapping rules and restrictions.

[0120] It should be noted that the above parameters may have corresponding relationships, which may be predefined by the protocol or specified when the system message is configured. The parameters that may have corresponding relationships include:

[0121] Preamble set and / or random access channel occasion (RACH occasion, RO) resources of Msg1;

[0122] Regular / New TDRA forms;

[0123] Normal / new Msg3 MAC subPDU format;

[0124] SSB threshold value T0.

[0125] The corresponding relationship of the above parameters can be specified through system messages.

[0126] 2. The terminal detects the signal quality RSRP of each SSB and determines whether it needs to request Msg3 to be sent repeatedly.

[0127] The terminal detects that the signal quality of all SSBs is lower than the threshold value T0. Optionally, the algorithm for selecting the SSB by the terminal can be determined by the terminal implementation (for example, selecting the SSB with the best signal quality). When the terminal detects that the signal quality of all SSBs is lower than the second threshold value T1 (rsrp-ThresholdSSB) but the signal quality of at least one SSB is higher than the first threshold value T0, the terminal selects one of the SSBs higher than the first threshold value T0. This is used for calculating the configuration parameters of Msg1.

[0128] When the terminal meets at least one of the following conditions defined by the protocol, the terminal selects to apply for repeated transmission of Msg3 and executes the above SSB measurement and selection criteria:

[0129] The terminal attempts to send RACH N times (performs N RACH attempts) according to the 4-step random access procedure defined in Rel-15 / 16, but does not receive a RAR (or the RACH process is unsuccessful), where N is configured by the protocol or higher-layer signaling;

[0130] Or, after the terminal reaches the upper limit of RACH attempts;

[0131] Alternatively, the terminal sends Msg1 multiple times to increase the transmit power until the uplink transmit power upper limit is reached;

[0132] Or, the data size of Msg3 exceeds a threshold;

[0133] Alternatively, in a normal random access procedure, Msg3 transmission fails and Msg3 is retransmitted M times but still fails, or Msg3 is retransmitted to an upper limit but still fails, where M is indicated by a system message.

[0134] Optionally, the terminal still uses the SSB selected in the normal RACH process, or selects the SSB according to the above-mentioned SSB measurement and selection criteria.

[0135] Optionally, after performing layer 1 filtering on the SSB signal quality, the terminal selects an SSB greater than the first threshold value T0 according to the SSB signal quality output by the layer 1 filtering, and sends Msg1 on the corresponding Msg1 time-frequency resource. Alternatively, the terminal selects the same SSB as before the request, or when switching from a normal PRACH process to a PRACH process repeated in Msg3, the terminal re-measures the SSB and selects an available SSB according to the above criteria.

[0136] 3. The base station detects Msg1 on the corresponding time-frequency resource RO to determine whether any terminal has applied for Msg3 repeatedly.

[0137] If the base station detects Msg1 on the new Msg1 RO resource or detects a new PRACH preamble, it means that a terminal is applying for a random access procedure for repeated Msg3. The base station determines the number of repeated transmissions of Msg3 based on the signal quality of Msg1 and performs resource scheduling.

[0138] 4. The base station sends the RAR and the corresponding RA-RNTI-scrambled DCI 1-0, and configures the parameters for the repeated transmission of Msg3 for the terminal (for example, the number of repetitions, the intra-time slot or inter-time slot frequency hopping mode, and the RV version).

[0139] Msg3 can be repeated in the following ways:

[0140] (1) The base station sends common RA-RNTI scrambled DCI 1-0 and new RAR information or TC-RNTI scrambled DCI 0-0. The new RAR information compresses the original fields in the RAR information and adds a new field to indicate the configuration information that Msg3 is repeatedly sent.

[0141] Optionally, the length of the new RAR information is the same as the length of the normal RAR information.

[0142] (2) Compress some fields in RAR / DCI 0-0 to reduce its indication range, and use the compressed bits to indicate the number of repetitions of Msg3.

[0143] For example, in a common RAR message, the modulation and coding scheme (MCS) occupies 4 bits, which is compressed to 3 bits. Msg3 only uses the first 8 MCS configurations in the MCS table, or uses certain 8 MCS configurations according to the protocol definition.

[0144] Alternatively, the power control occupies 3 bits, which are compressed into 2 bits to reduce the adjustment range of the power control.

[0145] Alternatively, the CSI request field occupies bits and is a reserved field, which can be used to indicate the number of repetitions of msg3.

[0146] Alternatively, the fields for other purposes are compressed, and the compressed bits are combined to transmit the information of the number of repetitions of msg3.

[0147] The number of repetitions of Msg3 may be a set of multiple values ​​configured through system messages, and the corresponding field in the RAR is used to indicate the corresponding value in the set and / or the Msg3 RV version.

[0148] The frequency hopping enable field in the RAR may be redefined as an inter-time slot frequency hopping enable field.

[0149] (3) In particular, the number of Msg3 repetitions may be a single value. In this case, only 1 bit is needed in the RAR message or the RA-RNTI scrambled DCI 1-0 or the TC-RNTI scrambled DCI 0-0 to indicate whether to trigger the msg3 repetition.

[0150] (4) The base station configures a PUSCH TDRA table dedicated to Msg3 repetition through a system message, wherein the TDRA table includes Msg3 repetition information.

[0151] After receiving the RAR message, the terminal determines each time slot resource and the number of repetitions of Msg3 PUSCH according to the TDRA field.

[0152] (5) The reserved field in the RA-RNTI scrambled DCI 1-0 is used to indicate how the terminal interprets the scheduling RAR corresponding to the scheduling, either according to the common RAR or according to the newly defined RAR.

[0153] (6) The protocol defines the LCID (Logical Channel ID) corresponding to the repeated Msg3, instructing the terminal to parse the received data according to the RAR format of the repeated msg3.

[0154] (7) The 1-bit reserved field in the SubPDU is used to indicate the subPDU type, indicating the RAR type.

[0155] Optionally, the RAR of the repeated transmission of msg3 is arranged on the last MAC subPDU in the MAC PDU if there is a msg3 repetition.

[0156] Optionally, through protocol pre-definition or system message notification, at most only one or several RAR subPDUs in a MAC PDU are RARs used for repeated transmission of msg3.

[0157] Optionally, the system is not expected to be configured simultaneously.

[0158] 5. After successfully parsing the RAR, the terminal sends Msg3 in the corresponding multiple time slots according to the scheduling information.

[0159] The terminal determines the RAR message type according to the RAPID or LCID or subPDU reserved field or the RA-RNTI scrambled DCI 1-0 reserved field and performs data parsing.

[0160] Second case:

[0161] The terminal sends Msg1, and the base station determines whether the terminal needs to execute the process of repeatedly sending Msg3 according to Msg1, and notifies the terminal to repeatedly send Msg3 in the Msg2 stage.

[0162] 1. The base station periodically sends SSB and system information, which includes at least one of the following information:

[0163] (1) The number of times Msg3 is sent repeatedly.

[0164] Indicates the configurable number of repetitions when Msg3 is sent repeatedly. The number of repetitions can be an integer or a set of multiple different integers.

[0165] (2) The TDRA table used when Msg3 is sent repeatedly.

[0166] The network configures a new set of TDRA tables for the terminal, which contains time domain configuration information and the corresponding number of Msg3 repetitions.

[0167] (3) The time slot configuration parameters of Msg3.

[0168] For example, whether inter-slot frequency hopping is supported, and the RV version of Msg3 PUSCH.

[0169] (4) The Msg2 RAR time window corresponds to the msg3 repeated sending process.

[0170] 2. The terminal sends Msg1 according to the random access process defined in the Rel-15 / 16 protocol.

[0171] 3. The base station receives and detects Msg1 and measures the signal strength of Msg1.

[0172] If the signal strength is lower than the second threshold value T1, the base station sends the RAR and RA-RNTI-scrambled DCI 1-0 to schedule the terminal to repeatedly send Msg3.

[0173] Msg3 can be repeated in the following ways:

[0174] (1) The reserved field in DCI 1-0 is used to indicate the terminal's interpretation method of RAR, which can be parsed according to the common RAR or the new RAR. Or both RAR message formats are attempted to be interpreted. If the parsing is successful according to the new RAR format, the process of retransmitting Msg3 is followed. Otherwise, the common RACH process is followed.

[0175] (2) The reserved field (CSI request field) in RAR is used as an indication of the RAR type. If the field is 1, it means that the terminal needs to parse the corresponding RAR type according to the repeated transmission of msg3, that is, trigger the repeated transmission mechanism of msg3.

[0176] (3) The base station sends two types of RA-RNTI scrambled DCI 1-0 corresponding to scheduling normal RAR and new RAR respectively.

[0177] Optionally, the two DCIs 1-0 have different RAR windows, and the new RAR window is behind the common RAR window; or optionally, the predefined common RAR is sent before the new RAR. For a terminal with a msg3 repetitive transmission function, one of the two RAR configurations is selected to decode and send msg3.

[0178] Optionally, the common RAR and the new RAR are sent in the same MAC PDU, the order of the common RAR is in front of the new RAR, or the new RAR can only be arranged in the last few subPDUs of the MAC PDU.

[0179] 4. The terminal with the msg3 retransmission function detects the two RARs respectively and sends msg3 according to the scheduling information.

[0180] 5. Optionally, if the terminal follows the normal msg3 sending process and sends multiple times (in a special case, the first msg3 reception failure triggers msg3 retransmission), but the base station still fails to receive successfully, the base station sends TC-RNTI encrypted DCI0_0. The reserved field in DCI 0_0 is used to instruct the terminal to switch to the msg3 retransmission mode, and the number of repetitions and RV version are specified; or DCI 0_0 is used to instruct the terminal to perform the msg3 retransmission process in the first case.

[0181] The Msg3 transmission method provided in the embodiment of the present application performs repeated transmission of Msg3 according to the channel conditions, improves the reliability of Msg3 transmission and reduces the number of retransmissions, and ensures the efficiency of random access process execution.

[0182] Figure 3 The second schematic diagram of the Msg3 transmission method provided in the embodiment of the present application is as follows: Figure 3 As shown, the embodiment of the present application provides a Msg3 transmission method, and the execution subject may be a network device, such as a base station. The method includes:

[0183] Step 301: The network device sends Msg3 repeated sending indication information to the terminal device, where the Msg3 repeated sending indication information is used to determine the configuration parameters for Msg3 repeated sending for the terminal device;

[0184] Step 302: Receive Msg3 repeatedly sent by the terminal device according to Msg3 retransmission indication information.

[0185] Optionally, the Msg3 repeated sending indication information is included in at least one of the following items:

[0186] System information block SIB;

[0187] Random access response RAR information;

[0188] Downlink control information DCI scrambled by random access radio network temporary identifier RA-RNTI;

[0189] The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI.

[0190] Optionally, before the receiving the Msg3 repeatedly sent by the terminal device according to the Msg3 retransmission indication information, the method further includes:

[0191] Send a synchronization signal block SSB and system information to the terminal device; the SSB and the system information are used for the terminal device to determine whether to request the network device to repeat the sending operation of Msg3.

[0192] Optionally, the system information includes at least one of the following:

[0193] The first threshold value T0 of signal strength / signal quality / path loss;

[0194] The third threshold value M0 of the Msg3 transport block size;

[0195] Allow list / block list for Msg3 transport;

[0196] The second threshold value T1.

[0197] Optionally, the system information includes at least one of the following:

[0198] The number of times Msg3 is sent repeatedly;

[0199] The time domain resource allocation TDRA table used when Msg3 is repeatedly sent;

[0200] Msg3 time slot configuration parameters;

[0201] Msg3 repeatedly sends the corresponding Msg1 related parameters;

[0202] Msg3 repeatedly sends the corresponding Msg2 related parameters.

[0203] Optionally, the RAR information includes at least one of the following:

[0204] The number of times Msg3 is sent repeatedly;

[0205] Msg3 repeatedly sends the inter-slot frequency hopping enable field;

[0206] Msg3 Redundancy Version RV.

[0207] Optionally, the downlink control information DCI scrambled by the random access radio network temporary identifier RA-RNTI includes:

[0208] The parsing method indication of the RAR information; the parsing method indication is used to instruct the terminal device to parse according to the RAR format in the protocol or to repeatedly send the corresponding RAR format for parsing according to Msg3.

[0209] Optionally, the DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI includes at least one of the following:

[0210] Msg3 repeated trigger message;

[0211] The number of times Msg3 is sent repeatedly;

[0212] Frequency hopping mode for repeated transmission of Msg3;

[0213] Msg3 Redundancy Version RV.

[0214] Optionally, the TDRA table includes time domain configuration information and a corresponding number of Msg3 repetitions.

[0215] Optionally, the Msg1 related parameters corresponding to the repeated sending of Msg3 include at least one of the following:

[0216] A candidate physical random access channel PRACH preamble code set;

[0217] The time-frequency resources and period for sending Msg1.

[0218] Optionally, the Msg2 related parameters corresponding to the repeated sending of Msg3 include at least one of the following:

[0219] RAR time window;

[0220] MAC subPDU mapping rules and restrictions.

[0221] Optionally, before the network device sends Msg3 repeated sending indication information to the terminal device, the method includes:

[0222] A Msg1 sent by a receiving terminal device is received, wherein parameters of the Msg1 are determined by a system message and / or an SSB measurement result.

[0223] The Msg3 transmission method provided in the embodiment of the present application performs repeated transmission of Msg3 according to the channel conditions, improves the reliability of Msg3 transmission and reduces the number of retransmissions, and ensures the efficiency of random access process execution.

[0224] Figure 4 This is one of the schematic diagrams of the Msg3 transmission device provided in the embodiment of the present application, such as Figure 4 As shown, the embodiment of the present application provides a Msg3 transmission device, including a first receiving module 401 and a first sending module 402, wherein:

[0225] The first receiving module 401 is used to receive Msg3 repeated sending indication information sent by the network device and determine the configuration parameters for repeated sending of Msg3; the first sending module 402 is used to repeatedly send Msg3 according to the Msg3 repeated sending indication information.

[0226] Optionally, the Msg3 repeated sending indication information is included in at least one of the following items:

[0227] System information block SIB;

[0228] Random access response RAR information;

[0229] Downlink control information DCI scrambled by random access radio network temporary identifier RA-RNTI;

[0230] The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI.

[0231] Optionally, it further includes a second receiving module and a determining module;

[0232] The second receiving module is used to receive a synchronization signal block SSB and system information sent by a network device;

[0233] The determination module is used to determine whether to request the network device to repeat the sending operation of Msg3 based on the SSB and the system information.

[0234] Optionally, the system information includes at least one of the following:

[0235] The first threshold value T0 of signal strength / signal quality / path loss;

[0236] The third threshold value M0 of the Msg3 transport block size;

[0237] Allow list / block list for Msg3 transport;

[0238] The second threshold value T1.

[0239] Optionally, a selection module is also included;

[0240] The selection module is used to select parameters corresponding to the SSB whose signal quality is greater than the first threshold value T0 as the configuration parameters of the first Msg1 when the first condition is met; the configuration parameters are the subsequent set of the preamble code preamble of Msg1 obtained by combining the selected SSB number with the Msg3 repeatedly sending the corresponding Msg1 related parameters, and the time-frequency resource configuration parameters of the random access channel RACH opportunity.

[0241] Optionally, the first condition includes at least one of the following:

[0242] The terminal device detects that the signal quality of all SSBs is lower than a second threshold value T1, where the second threshold value is a threshold value for selecting SSB in a 4-step random access process in the protocol, or the second threshold value is a threshold value notified through a system message;

[0243] The terminal device has made N random access channel RACH attempts and all failed;

[0244] The number of RACH attempts performed by the terminal device reaches a first upper limit value;

[0245] The terminal device sends Msg1 multiple times to increase the transmission power and the transmission power reaches the second upper limit value;

[0246] The data size of Msg3 exceeds the third threshold value M0;

[0247] Msg3 transmission fails and Msg3 is retransmitted M times but still fails;

[0248] Msg3 transmission fails and the number of Msg3 retransmissions reaches the third upper limit.

[0249] Optionally, the system information includes at least one of the following:

[0250] The number of times Msg3 is sent repeatedly;

[0251] The time domain resource allocation TDRA table used when Msg3 is repeatedly sent;

[0252] Msg3 time slot configuration parameters;

[0253] Msg3 repeatedly sends the corresponding Msg1 related parameters;

[0254] Msg3 repeatedly sends the corresponding Msg2 related parameters.

[0255] Optionally, the RAR information includes at least one of the following:

[0256] The number of times Msg3 is sent repeatedly;

[0257] Msg3 repeatedly sends the inter-slot frequency hopping enable field;

[0258] Msg3 Redundancy Version RV.

[0259] Optionally, the downlink control information DCI scrambled by the random access radio network temporary identifier RA-RNTI includes:

[0260] The parsing method indication of the RAR information; the parsing method indication is used to instruct the terminal device to parse according to the RAR format in the protocol or to repeatedly send the corresponding RAR format for parsing according to Msg3.

[0261] Optionally, the DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI includes at least one of the following:

[0262] Msg3 repeated trigger message;

[0263] The number of times Msg3 is sent repeatedly;

[0264] Frequency hopping mode for repeated transmission of Msg3;

[0265] Msg3 Redundancy Version RV.

[0266] Optionally, the TDRA table includes time domain configuration information and a corresponding number of Msg3 repetitions.

[0267] Optionally, the Msg1 related parameters corresponding to the repeated sending of Msg3 include at least one of the following:

[0268] A candidate physical random access channel PRACH preamble code set;

[0269] The time-frequency resources and period for sending Msg1.

[0270] Optionally, the Msg2 related parameters corresponding to the repeated sending of Msg3 include at least one of the following:

[0271] RAR time window;

[0272] MAC subPDU mapping rules and restrictions.

[0273] Optionally, it also includes a second sending module;

[0274] The second sending module is used to send Msg1 to the base station, and the parameters of the Msg1 are determined by the system message and / or the SSB measurement result.

[0275] The above-mentioned Msg3 transmission device provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is a terminal device, and can achieve the same technical effect. The parts and beneficial effects that are the same as those in the method embodiment in this embodiment will not be described in detail here.

[0276] The Msg3 transmission device in the embodiment of the present application can be a device, or a component, integrated circuit, or chip in a terminal. The device can be a mobile terminal or a non-mobile terminal. Exemplarily, the mobile terminal can include but is not limited to the types of terminal 11 listed above, and the non-mobile terminal can be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0277] The Msg3 transmission device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0278] Figure 5 The second schematic diagram of the Msg3 transmission device provided in the embodiment of the present application is as follows: Figure 5 As shown, the embodiment of the present application provides a Msg3 transmission device, including a third sending module 501 and a third receiving module 502, wherein:

[0279] A third sending module, used to send Msg3 repeated sending indication information to the terminal device, wherein the Msg3 repeated sending indication information is used to determine the configuration parameters of Msg3 repeated sending for the terminal device;

[0280] The third receiving module is used to receive Msg3 repeatedly sent by the terminal device according to Msg3 repeated sending indication information.

[0281] Optionally, the Msg3 repeated sending indication information is included in at least one of the following items:

[0282] System information block SIB;

[0283] Random access response RAR information;

[0284] Downlink control information DCI scrambled by random access radio network temporary identifier RA-RNTI;

[0285] The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI.

[0286] Optionally, a fourth sending module is also included;

[0287] The fourth sending module is used to send a synchronization signal block SSB and system information to the terminal device; the SSB and the system information are used for the terminal device to determine whether to request the network device to repeat the sending operation of Msg3.

[0288] Optionally, the system information includes at least one of the following:

[0289] The first threshold value T0 of signal strength / signal quality / path loss;

[0290] The third threshold value M0 of the Msg3 transport block size;

[0291] Allow list / block list for Msg3 transport;

[0292] The second threshold value T1.

[0293] Optionally, the system information includes at least one of the following:

[0294] The number of times Msg3 is sent repeatedly;

[0295] The time domain resource allocation TDRA table used when Msg3 is repeatedly sent;

[0296] Msg3 time slot configuration parameters;

[0297] Msg3 repeatedly sends the corresponding Msg1 related parameters;

[0298] Msg3 repeatedly sends the corresponding Msg2 related parameters.

[0299] Optionally, the RAR information includes at least one of the following:

[0300] The number of times Msg3 is sent repeatedly;

[0301] Msg3 repeatedly sends the inter-slot frequency hopping enable field;

[0302] Msg3 Redundancy Version RV.

[0303] Optionally, the downlink control information DCI scrambled by the random access radio network temporary identifier RA-RNTI includes:

[0304] The parsing method indication of the RAR information; the parsing method indication is used to instruct the terminal device to parse according to the RAR format in the protocol or to repeatedly send the corresponding RAR format for parsing according to Msg3.

[0305] Optionally, the DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI includes at least one of the following:

[0306] Msg3 repeated trigger message;

[0307] The number of times Msg3 is sent repeatedly;

[0308] Frequency hopping mode for repeated transmission of Msg3;

[0309] Msg3 Redundancy Version RV.

[0310] Optionally, the TDRA table includes time domain configuration information and a corresponding number of Msg3 repetitions.

[0311] Optionally, the Msg1 related parameters corresponding to the repeated sending of Msg3 include at least one of the following:

[0312] A candidate physical random access channel PRACH preamble code set;

[0313] The time-frequency resources and period for sending Msg1.

[0314] Optionally, the Msg2 related parameters corresponding to the repeated sending of Msg3 include at least one of the following:

[0315] RAR time window;

[0316] MAC subPDU mapping rules and restrictions.

[0317] Optionally, a fourth receiving module is also included;

[0318] The fourth receiving module is used to receive Msg1 sent by the terminal device, and the parameters of the Msg1 are determined by the system message and / or the SSB measurement result.

[0319] The above-mentioned Msg3 transmission device provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is a network device, and can achieve the same technical effect. The parts and beneficial effects that are the same as those in the method embodiment in this embodiment will not be described in detail here.

[0320] Figure 6 A schematic diagram of the hardware structure of the terminal provided in the embodiment of the present application is shown in FIG. Figure 6 As shown, the terminal 600 includes but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, and a processor 610 and other components.

[0321] Those skilled in the art will appreciate that the terminal 600 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 610 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Figure 6 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0322] It should be understood that in the embodiment of the present application, the input unit 604 may include a graphics processor (Graphics Processing Unit, GPU) 6041 and a microphone 6042, and the graphics processor 6041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 606 may include a display panel 6061, and the display panel 6061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 607 includes a touch panel 6071 and other input devices 6072. The touch panel 6071 is also called a touch screen. The touch panel 6071 may include two parts: a touch detection device and a touch controller. Other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0323] In the embodiment of the present application, the radio frequency unit 601 receives downlink data from the network side device and sends it to the processor 610 for processing; in addition, the uplink data is sent to the network side device. Generally, the radio frequency unit 601 includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0324] The memory 609 can be used to store software programs or instructions and various data. The memory 609 can mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area can store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 609 can include a high-speed random access memory, and can also include a non-volatile memory, wherein the non-volatile memory can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. For example, at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0325] The processor 610 may include one or more processing units; optionally, the processor 610 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and application programs or instructions, etc., and the modem processor mainly processes wireless communications, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 610.

[0326] The radio frequency unit 601 is used to receive the Msg3 repeated transmission indication information sent by the network device and determine the configuration parameters for the repeated transmission of Msg3;

[0327] It is also used to repeatedly send Msg3 according to Msg3 repetition indication information.

[0328] Optionally, the Msg3 repeated sending indication information is included in at least one of the following items:

[0329] System information block SIB;

[0330] Random access response RAR information;

[0331] Downlink control information DCI scrambled by random access radio network temporary identifier RA-RNTI;

[0332] The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI.

[0333] Optionally, before repeatedly sending Msg3 according to the Msg3 re-sending indication information, the method further includes:

[0334] Receive synchronization signal blocks SSB and system information sent by network equipment;

[0335] Based on the SSB and the system information, determine whether to request the network device to repeat the sending operation of Msg3.

[0336] Optionally, the system information includes at least one of the following:

[0337] The first threshold value T0 of signal strength / signal quality / path loss;

[0338] The third threshold value M0 of the Msg3 transport block size;

[0339] Allow list / block list for Msg3 transport;

[0340] The second threshold value T1.

[0341] Optionally, before repeatedly sending Msg3 according to the Msg3 repeated sending indication information, the method includes:

[0342] When the first condition is met, the terminal device selects the parameters corresponding to the SSB whose signal quality is greater than the first threshold value T0 as the configuration parameters of the first Msg1; the configuration parameters are the subsequent set of the preamble code preamble of Msg1 obtained by combining the selected SSB number with the Msg3 to repeatedly send the corresponding Msg1 related parameters, and the time-frequency resource configuration parameters of the random access channel RACH opportunity.

[0343] Optionally, the first condition includes at least one of the following:

[0344] The terminal device detects that the signal quality of all SSBs is lower than a second threshold value T1, where the second threshold value is a threshold value for selecting SSB in a 4-step random access process in the protocol, or the second threshold value is a threshold value notified through a system message;

[0345] The terminal device has made N random access channel RACH attempts and all failed;

[0346] The number of RACH attempts performed by the terminal device reaches a first upper limit value;

[0347] The terminal device sends Msg1 multiple times to increase the transmission power and the transmission power reaches the second upper limit value;

[0348] The data size of Msg3 exceeds the third threshold value M0;

[0349] Msg3 transmission fails and Msg3 is retransmitted M times but still fails;

[0350] Msg3 transmission fails and the number of Msg3 retransmissions reaches the third upper limit.

[0351] Optionally, the system information includes at least one of the following:

[0352] The number of times Msg3 is sent repeatedly;

[0353] The time domain resource allocation TDRA table used when Msg3 is repeatedly sent;

[0354] Msg3 time slot configuration parameters;

[0355] Msg3 repeatedly sends the corresponding Msg1 related parameters;

[0356] Msg3 repeatedly sends the corresponding Msg2 related parameters.

[0357] Optionally, the RAR information includes at least one of the following:

[0358] The number of times Msg3 is sent repeatedly;

[0359] Msg3 repeatedly sends the inter-slot frequency hopping enable field;

[0360] Msg3 Redundancy Version RV.

[0361] Optionally, the downlink control information DCI scrambled by the random access radio network temporary identifier RA-RNTI includes:

[0362] The parsing method indication of the RAR information; the parsing method indication is used to instruct the terminal device to parse according to the RAR format in the protocol or to repeatedly send the corresponding RAR format for parsing according to Msg3.

[0363] Optionally, the DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI includes at least one of the following:

[0364] Msg3 repeated trigger message;

[0365] The number of times Msg3 is sent repeatedly;

[0366] Frequency hopping mode for repeated transmission of Msg3;

[0367] Msg3 Redundancy Version RV.

[0368] Optionally, the TDRA table includes time domain configuration information and a corresponding number of Msg3 repetitions.

[0369] Optionally, the Msg1 related parameters corresponding to the repeated sending of Msg3 include at least one of the following:

[0370] A candidate physical random access channel PRACH preamble code set;

[0371] The time-frequency resources and period for sending Msg1.

[0372] Optionally, the Msg2 related parameters corresponding to the repeated sending of Msg3 include at least one of the following:

[0373] RAR time window;

[0374] MAC subPDU mapping rules and restrictions.

[0375] Optionally, before the terminal device receives the Msg3 repeated sending indication information sent by the network device, the method includes:

[0376] Sending Msg1 to the network device, wherein parameters of the Msg1 are determined by the system message and / or the SSB measurement result.

[0377] The above-mentioned terminal device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0378] Figure 7 A schematic diagram of the hardware structure of the network side device provided in the embodiment of the present application, such as Figure 7 As shown, the network device 700 includes: an antenna 701, a radio frequency device 702, and a baseband device 703. The antenna 701 is connected to the radio frequency device 702. In the uplink direction, the radio frequency device 702 receives information through the antenna 701 and sends the received information to the baseband device 703 for processing. In the downlink direction, the baseband device 703 processes the information to be sent and sends it to the radio frequency device 702. The radio frequency device 702 processes the received information and sends it out through the antenna 701.

[0379] The frequency band processing device may be located in the baseband device 703 . The method performed by the network-side device in the above embodiment may be implemented in the baseband device 703 . The baseband device 703 includes a processor 704 and a memory 705 .

[0380] The baseband device 703 may include, for example, at least one baseband board on which a plurality of chips are arranged. Figure 7 As shown, one of the chips is, for example, a processor 704, which is connected to a memory 705 to call a program in the memory 705 to execute the network device operations shown in the above method embodiment.

[0381] The baseband device 703 may further include a network interface 706 for exchanging information with the radio frequency device 702 . The interface may be, for example, a common public radio interface (CPRI for short).

[0382] Specifically, the network side device of the embodiment of the present invention further includes: instructions or programs stored in the memory 705 and executable on the processor 704, and the processor 704 calls the instructions or programs in the memory 705 to perform the following method steps:

[0383] Sending Msg3 repeated sending indication information to the terminal device, wherein the Msg3 repeated sending indication information is used to determine a configuration parameter for the repeated sending of Msg3 for the terminal device;

[0384] Receive Msg3 repeatedly sent by the terminal device according to Msg3 retransmission indication information.

[0385] Optionally, the Msg3 repeated sending indication information is included in at least one of the following items:

[0386] System information block SIB;

[0387] Random access response RAR information;

[0388] Downlink control information DCI scrambled by random access radio network temporary identifier RA-RNTI;

[0389] The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI.

[0390] Optionally, before the receiving the Msg3 repeatedly sent by the terminal device according to the Msg3 retransmission indication information, the method further includes:

[0391] Send a synchronization signal block SSB and system information to the terminal device; the SSB and the system information are used for the terminal device to determine whether to request the network device to repeat the sending operation of Msg3.

[0392] Optionally, the system information includes at least one of the following:

[0393] The first threshold value T0 of signal strength / signal quality / path loss;

[0394] The third threshold value M0 of the Msg3 transport block size;

[0395] Allow list / block list for Msg3 transport;

[0396] The second threshold value T1.

[0397] Optionally, the system information includes at least one of the following:

[0398] The number of times Msg3 is sent repeatedly;

[0399] The time domain resource allocation TDRA table used when Msg3 is repeatedly sent;

[0400] Msg3 time slot configuration parameters;

[0401] Msg3 repeatedly sends the corresponding Msg1 related parameters;

[0402] Msg3 repeatedly sends the corresponding Msg2 related parameters.

[0403] Optionally, the RAR information includes at least one of the following:

[0404] The number of times Msg3 is sent repeatedly;

[0405] Msg3 repeatedly sends the inter-slot frequency hopping enable field;

[0406] Msg3 Redundancy Version RV.

[0407] Optionally, the downlink control information DCI scrambled by the random access radio network temporary identifier RA-RNTI includes:

[0408] The parsing method indication of the RAR information; the parsing method indication is used to instruct the terminal device to parse according to the RAR format in the protocol or to repeatedly send the corresponding RAR format for parsing according to Msg3.

[0409] Optionally, the DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI includes at least one of the following:

[0410] Msg3 repeated trigger message;

[0411] The number of times Msg3 is sent repeatedly;

[0412] Frequency hopping mode for repeated transmission of Msg3;

[0413] Msg3 Redundancy Version RV.

[0414] Optionally, the TDRA table includes time domain configuration information and a corresponding number of Msg3 repetitions.

[0415] Optionally, the Msg1 related parameters corresponding to the repeated sending of Msg3 include at least one of the following:

[0416] A candidate physical random access channel PRACH preamble code set;

[0417] The time-frequency resources and period for sending Msg1.

[0418] Optionally, the Msg2 related parameters corresponding to the repeated sending of Msg3 include at least one of the following:

[0419] RAR time window;

[0420] MAC subPDU mapping rules and restrictions.

[0421] Optionally, before the network device sends Msg3 repeated sending indication information to the terminal device, the method includes:

[0422] A Msg1 sent by a receiving terminal device is received, wherein parameters of the Msg1 are determined by a system message and / or an SSB measurement result.

[0423] The above-mentioned network device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0424] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned Msg3 transmission method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0425] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0426] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned Msg3 transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0427] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0428] It should be noted that, in this article, the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0429] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0430] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A message Msg3 transmission method, characterized in that: include: The terminal device receives the Msg3 retransmission indication information sent by the network device, and determines the configuration parameters for the Msg3 retransmission; Repeat sending Msg3 according to the Msg3 re-sending indication information; The Msg3 repetition sending indication information includes at least one of the following: Random access response RAR information, the MCS field in the RAR information is compressed, and the compressed MCS field indicates MCS configuration information and the number of Msg3 repetitions; A reserved field in the downlink control information DCI 1-0 scrambled by the random access radio network temporary identifier RA-RNTI; the reserved field is used to carry the parsing method indication of the RAR information; the parsing method indication is used to instruct the terminal device to parse according to the RAR format in the protocol or to repeatedly send the corresponding RAR format for parsing according to Msg3.

2. The Msg3 transmission method according to claim 1, characterized in that: The Msg3 repetition sending indication information further includes at least one of the following: System information block SIB; The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI.

3. The Msg3 transmission method according to claim 1, characterized in that: Before repeatedly sending Msg3 according to the Msg3 repetition indication information, the method further includes: Receive synchronization signal blocks SSB and system information sent by network equipment; Based on the SSB and the system information, determine whether to request the network device to repeat the sending operation of Msg3.

4. The Msg3 transmission method according to claim 3, characterized in that: The system information contains at least one of the following: The first threshold value T0 of signal strength / signal quality / path loss; The third threshold value M0 of the Msg3 transport block size; Allow list / block list for Msg3 transport; The second threshold value T1.

5. The Msg3 transmission method according to claim 4, characterized in that: Before the repeatedly sending Msg3 according to the Msg3 repeated sending indication information, the method includes: When the first condition is met, the terminal device selects the parameters corresponding to the SSB whose signal quality is greater than the first threshold value T0 as the configuration parameters of the first Msg1; the configuration parameters are the subsequent set of the preamble code preamble of Msg1 obtained by combining the selected SSB number with the Msg3 to repeatedly send the corresponding Msg1 related parameters, and the time-frequency resource configuration parameters of the random access channel RACH opportunity.

6. The Msg3 transmission method according to claim 5, characterized in that: The first condition includes at least one of the following: The terminal device detects that the signal quality of all SSBs is lower than a second threshold value T1, where the second threshold value is a threshold value for selecting SSB in a 4-step random access process in the protocol, or the second threshold value is a threshold value notified through a system message; The terminal device has made N random access channel RACH attempts and all failed; The number of RACH attempts performed by the terminal device reaches a first upper limit value; The terminal device sends Msg1 multiple times to increase the transmission power and the transmission power reaches the second upper limit value; The data size of Msg3 exceeds the third threshold value M0; Msg3 transmission fails and Msg3 is retransmitted M times but still fails; Msg3 transmission fails and the number of Msg3 retransmissions reaches the third upper limit.

7. The Msg3 transmission method according to claim 3, characterized in that: The system information contains at least one of the following: The number of times Msg3 is sent repeatedly; The time domain resource allocation TDRA table used when Msg3 is repeatedly sent; Msg3 time slot configuration parameters; Msg3 repeatedly sends the corresponding Msg1 related parameters; Msg3 repeatedly sends the corresponding Msg2 related parameters.

8. The Msg3 transmission method according to claim 1, characterized in that: The RAR information includes at least one of the following: Msg3 repeatedly sends the inter-slot frequency hopping enable field; Msg3 Redundancy Version RV.

9. The Msg3 transmission method according to claim 2, characterized in that: The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI includes at least one of the following: Msg3 repeated trigger message; The number of times Msg3 is sent repeatedly; Frequency hopping mode for repeated transmission of Msg3; Msg3 Redundancy Version RV.

10. The Msg3 transmission method according to claim 7, characterized in that: The parameters of Msg1 corresponding to the repeated sending of Msg3 include at least one of the following: A candidate physical random access channel PRACH preamble code set; The time-frequency resources and period for sending Msg1.

11. The Msg3 transmission method according to claim 7, characterized in that: The parameters of Msg2 corresponding to the repeated sending of Msg3 include at least one of the following: RAR time window; MAC subPDU mapping rules and restrictions.

12. The Msg3 transmission method according to claim 1 or 5, characterized in that: Before the terminal device receives the Msg3 repeated sending indication information sent by the network device, the method includes: Sending Msg1 to the network device, wherein parameters of the Msg1 are determined by the system message and / or the SSB measurement result.

13. A message Msg3 transmission method, characterized in that: include: The network device sends Msg3 repeated sending indication information to the terminal device, where the Msg3 repeated sending indication information is used to determine a configuration parameter for Msg3 repeated sending for the terminal device; Receiving Msg3 repeatedly sent by the terminal device according to Msg3 retransmission indication information; The Msg3 repetition sending indication information includes at least one of the following: Random access response RAR information, the MCS field in the RAR information is compressed, and the compressed MCS field indicates MCS configuration information and the number of Msg3 repetitions; A reserved field in the downlink control information DCI 1-0 scrambled by the random access radio network temporary identifier RA-RNTI; the reserved field is used to carry the parsing method indication of the RAR information; the parsing method indication is used to instruct the terminal device to parse according to the RAR format in the protocol or to repeatedly send the corresponding RAR format for parsing according to Msg3.

14. The Msg3 transmission method according to claim 13, characterized in that: The Msg3 repetition sending indication information further includes at least one of the following: System information block SIB; The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI.

15. The Msg3 transmission method according to claim 13, characterized in that: Before the receiving of the Msg3 repeatedly sent by the terminal device according to the Msg3 retransmission indication information, the method further includes: Send a synchronization signal block SSB and system information to the terminal device; the SSB and the system information are used for the terminal device to determine whether to request the network device to repeat the sending operation of Msg3.

16. The Msg3 transmission method according to claim 14, characterized in that: The system information contains at least one of the following: The first threshold value T0 of signal strength / signal quality / path loss; The third threshold value M0 of the Msg3 transport block size; Allow list / block list for Msg3 transport; The second threshold value T1.

17. The Msg3 transmission method according to claim 14, characterized in that: The system information contains at least one of the following: The number of times Msg3 is sent repeatedly; The time domain resource allocation TDRA table used when Msg3 is repeatedly sent; Msg3 time slot configuration parameters; Msg3 repeatedly sends the corresponding Msg1 related parameters; Msg3 repeatedly sends the corresponding Msg2 related parameters.

18. The Msg3 transmission method according to claim 13, characterized in that: The RAR information includes at least one of the following: Msg3 repeatedly sends the inter-slot frequency hopping enable field; Msg3 Redundancy Version RV.

19. The Msg3 transmission method according to claim 14, characterized in that: The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI includes at least one of the following: Msg3 repeated trigger message; The number of times Msg3 is sent repeatedly; Frequency hopping mode for repeated transmission of Msg3; Msg3 Redundancy Version RV.

20. The Msg3 transmission method according to claim 17, characterized in that: The parameters of Msg1 corresponding to the repeated sending of Msg3 include at least one of the following: A candidate physical random access channel PRACH preamble code set; The time-frequency resources and period for sending Msg1.

21. The Msg3 transmission method according to claim 17, characterized in that: The parameters of Msg2 corresponding to the repeated sending of Msg3 include at least one of the following: RAR time window; MAC subPDU mapping rules and restrictions.

22. The Msg3 transmission method according to claim 15, characterized in that: Before the network device sends Msg3 repeated sending indication information to the terminal device, the method includes: A Msg1 sent by a receiving terminal device is received, wherein parameters of the Msg1 are determined by a system message and / or an SSB measurement result.

23. A message Msg3 transmission device, characterized in that: include: A first receiving module is used to receive Msg3 repeated sending indication information sent by a network device, and determine the configuration parameters for repeated sending of Msg3; A first sending module, configured to repeatedly send Msg3 according to Msg3 repeated sending indication information; The Msg3 repetition sending indication information includes at least one of the following: Random access response RAR information, the MCS field in the RAR information is compressed, and the compressed MCS field indicates MCS configuration information and the number of Msg3 repetitions; A reserved field in the downlink control information DCI 1-0 scrambled by the random access radio network temporary identifier RA-RNTI; the reserved field is used to carry the parsing method indication of the RAR information; the parsing method indication is used to instruct the terminal device to parse according to the RAR format in the protocol or to repeatedly send the corresponding RAR format for parsing according to Msg3.

24. The Msg3 transmission device according to claim 23, characterized in that: The Msg3 repetition sending indication information further includes at least one of the following: System information block SIB; The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI.

25. The Msg3 transmission device according to claim 23, characterized in that: Also includes a second receiving module and a determining module; The second receiving module is used to receive a synchronization signal block SSB and system information sent by a network device; The determination module is used to determine whether to request the network device to repeat the sending operation of Msg3 based on the SSB and the system information.

26. The Msg3 transmission device according to claim 25, characterized in that: The system information includes at least one of the following: The first threshold value T0 of signal strength / signal quality / path loss; The third threshold value M0 of the Msg3 transport block size; Allow list / block list for Msg3 transport; The second threshold value T1.

27. The Msg3 transmission device according to claim 26, characterized in that: Also includes selection modules; The selection module is used to select parameters corresponding to the SSB whose signal quality is greater than the first threshold value T0 as the configuration parameters of the first Msg1 when the first condition is met; the configuration parameters are the subsequent set of the preamble code preamble of Msg1 obtained by combining the selected SSB number with the Msg3 repeatedly sending the corresponding Msg1 related parameters, and the time-frequency resource configuration parameters of the random access channel RACH opportunity.

28. The Msg3 transmission device according to claim 27, characterized in that: The first condition includes at least one of the following: The terminal device detects that the signal quality of all SSBs is lower than a second threshold value T1, where the second threshold value is a threshold value for selecting SSB in a 4-step random access process in the protocol, or the second threshold value is a threshold value notified through a system message; The terminal device has made N random access channel RACH attempts and all failed; The number of RACH attempts performed by the terminal device reaches a first upper limit value; The terminal device sends Msg1 multiple times to increase the transmission power and the transmission power reaches the second upper limit value; The data size of Msg3 exceeds the third threshold value M0; Msg3 transmission fails and Msg3 is retransmitted M times but still fails; Msg3 transmission fails and the number of Msg3 retransmissions reaches the third upper limit.

29. The Msg3 transmission device according to claim 25, characterized in that: The system information includes at least one of the following: The number of times Msg3 is sent repeatedly; The time domain resource allocation TDRA table used when Msg3 is repeatedly sent; Msg3 time slot configuration parameters; Msg3 repeatedly sends the corresponding Msg1 related parameters; Msg3 repeatedly sends the corresponding Msg2 related parameters.

30. The Msg3 transmission device according to claim 23, characterized in that: The RAR information includes at least one of the following: Msg3 repeatedly sends the inter-slot frequency hopping enable field; Msg3 Redundancy Version RV.

31. The Msg3 transmission device according to claim 24, characterized in that: The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI includes at least one of the following: Msg3 repeated trigger message; The number of times Msg3 is sent repeatedly; Frequency hopping mode for repeated transmission of Msg3; Msg3 Redundancy Version RV.

32. The Msg3 transmission device according to claim 29, characterized in that: The parameters of Msg1 corresponding to the repeated sending of Msg3 include at least one of the following: A candidate physical random access channel PRACH preamble code set; The time-frequency resources and period for sending Msg1.

33. The Msg3 transmission device according to claim 29, characterized in that: The parameters of Msg2 corresponding to the repeated sending of Msg3 include at least one of the following: RAR time window; MAC subPDU mapping rules and restrictions.

34. The Msg3 transmission device according to claim 23 or 27, characterized in that: Also includes a second sending module; The second sending module is used to send Msg1 to the base station, and the parameters of the Msg1 are determined by the system message and / or the SSB measurement result.

35. A message Msg3 transmission device, characterized in that: include: A third sending module, used to send Msg3 repeated sending indication information to the terminal device, wherein the Msg3 repeated sending indication information is used to determine the configuration parameters of Msg3 repeated sending for the terminal device; A third receiving module, configured to receive Msg3 repeatedly sent by the terminal device according to Msg3 retransmission indication information; The Msg3 repetition sending indication information includes at least one of the following: Random access response RAR information, the MCS field in the RAR information is compressed, and the compressed MCS field indicates MCS configuration information and the number of Msg3 repetitions; A reserved field in the downlink control information DCI 1-0 scrambled by the random access radio network temporary identifier RA-RNTI; the reserved field is used to carry the parsing method indication of the RAR information; the parsing method indication is used to instruct the terminal device to parse according to the RAR format in the protocol or to repeatedly send the corresponding RAR format for parsing according to Msg3.

36. The Msg3 transmission device according to claim 35, characterized in that: The Msg3 repetition sending indication information further includes at least one of the following: System information block SIB; The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI.

37. The Msg3 transmission device according to claim 35, characterized in that: Also includes a fourth sending module; The fourth sending module is used to send a synchronization signal block SSB and system information to the terminal device; the SSB and the system information are used for the terminal device to determine whether to request the network device to repeat the sending operation of Msg3.

38. The Msg3 transmission device according to claim 37, characterized in that: The system information includes at least one of the following: The first threshold value T0 of signal strength / signal quality / path loss; The third threshold value M0 of the Msg3 transport block size; Allow list / block list for Msg3 transport; The second threshold value T1.

39. The Msg3 transmission device according to claim 37, characterized in that: The system information includes at least one of the following: The number of times Msg3 is sent repeatedly; The time domain resource allocation TDRA table used when Msg3 is repeatedly sent; Msg3 time slot configuration parameters; Msg3 repeatedly sends the corresponding Msg1 related parameters; Msg3 repeatedly sends the corresponding Msg2 related parameters.

40. The Msg3 transmission device according to claim 35, characterized in that: The RAR information includes at least one of the following: Msg3 repeatedly sends the inter-slot frequency hopping enable field; Msg3 Redundancy Version RV.

41. The Msg3 transmission device according to claim 36, characterized in that: The DCI scrambled by the temporary cell radio network temporary identifier TC-RNTI includes at least one of the following: Msg3 repeated trigger message; The number of times Msg3 is sent repeatedly; Frequency hopping mode for repeated transmission of Msg3; Msg3 Redundancy Version RV.

42. The Msg3 transmission device according to claim 39, characterized in that: The parameters of Msg1 corresponding to the repeated sending of Msg3 include at least one of the following: A candidate physical random access channel PRACH preamble code set; The time-frequency resources and period for sending Msg1.

43. The Msg3 transmission device according to claim 39, characterized in that: The parameters of Msg2 corresponding to the repeated sending of Msg3 include at least one of the following: RAR time window; MAC subPDU mapping rules and restrictions.

44. The Msg3 transmission device according to claim 37, characterized in that: Also includes a fourth receiving module; The fourth receiving module is used to receive Msg1 sent by the terminal device, and the parameters of the Msg1 are determined by the system message and / or the SSB measurement result.

45. A terminal device, characterized in that: It includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein when the program or instruction is executed by the processor, the steps of the message Msg3 transmission method as described in any one of claims 1 to 12 are implemented.

46. ​​A network device, characterized in that: It includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein when the program or instruction is executed by the processor, the steps of the message Msg3 transmission method as described in any one of claims 13 to 22 are implemented.

47. A readable storage medium, characterized in that The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, it implements the message Msg3 transmission method as described in any one of claims 1 to 12 or the steps of the Msg3 transmission method as described in any one of claims 13 to 22.

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